Under the Andes

Chapter XXI.
THE MIDST OF THE ENEMY.

Harry and I stood gazing at each other blankly in the semidarkness of the cavern.

"But it isn't possible," I objected finally to my own thoughts. "She would have cried out and we would have heard her. The spear may have been there before."

Then I raised my voice, calling her name many times at the top of my lungs. There was no answer.

"They've got her," said Harry, "and that's all there is to it. The cursed brutes crept up on her in the dark—much chance she had of crying out when they got their hands on her. I know it. Why did we leave her?"

"Where did you find the spear?" I asked.

Harry pointed toward the wall, away from the stream.

"On the ground?"

"Yes."

"Is there an exit from the cavern on that side?"

"I don't know."

"Well, that's our only chance. Come on!"

We found the exit, and another, and a third. Which to take? They were very similar to one another, except that the one in the middle sloped upward at a gentle incline, while the others were level.

"One is as good as another," I observed, and entered the one on the left.

Once started, we advanced with a rush. The passage was straight and narrow, clear of obstruction, and we kept at a steady run.

"They may have an hour's start of us," came Harry's voice at my side.

"Or five minutes," I returned. "We have no way of knowing. But I'm afraid we're on the wrong trail."

Still as I had said, one chance was as good as another, and we did not slacken our pace. The passage went straight forward, without a bend. The roof was low, just allowing us to pass without stooping, and the walls were rough and rugged.

It was not long before we found that we had taken the wrong chance, having covered, I think, some two or three miles when a wall loomed up directly in our path.

"At last, a turn!" panted Harry.

But it was not a turn. It was the end of the passage. We had been following a blind alley.

Harry let out a string of oaths, and I seconded him. Twenty minutes wasted, and another twenty to return!

There was nothing else for it. We shouldered our spears and started to retrace our steps.

"No use running now," I declared. "We can't keep it up forever, and we may as well save our strength. We'll never catch up with 'em, but we may find 'em."

Harry, striding ahead two or three paces in front, did not answer.

Finally we reached the cavern from which we had started.

"And now what?" asked Harry in a tone of the most utter dejection.

I pointed to the exit in the middle. "That! We should have taken it in the first place. On the raft we probably descended altogether something like five hundred feet from the level where we started—possibly twice that distance. And this passage which slopes upward will probably take us back."

"At least, it's as good as the other," Harry agreed; and we entered it.

We had not proceeded far before we found ourselves in difficulties. The gentle slope became a steep incline. Great rocks loomed up in our path.

In spots the passage was so narrow that two men could hardly have walked abreast through it, and its walls were rough and irregular, with sharp points projecting unexpectedly into our very faces.

Still we went forward and upward, scrambling over, under, round, between. At one point, when Harry was a few yards in front of me, he suddenly disappeared from sight as though swallowed by the mountain.

Rushing forward, I saw him scrambling to his feet at the bottom of a chasm some ten feet below. Luckily he had escaped serious injury, and climbed up on the other side, while I leaped across—a distance of about six feet.

"They could never have brought her through this," he declared, rubbing a bruised knee.

"Do you want to go back?" I asked.

But he said that would be useless, and I agreed with him. So we struggled onward, painfully and laboriously. The sharp corners of the rocks cut our feet and hands, and I had an ugly bruise on my left shoulder, besides many lesser ones. Harry's injured knee caused him to limp and thus further retarded our progress.

At times the passage broadened out until the wall on either side was barely visible, only to narrow down again till it was scarcely more than a crevice between the giant boulders. The variation of the incline was no less, being at times very nearly level, and at others mounting upward at an angle whose ascent was all but impossible. Somehow we crawled up, like flies on a wall.

When we came to a stream of water rushing directly across our path at the foot of a towering rock Harry gave a cry of joy and ran forward. I had not known until then how badly his knee was hurt, and when I came up to where he was bathing it in the stream and saw how black and swollen it was, I insisted that he give it a rest. But he absolutely refused, and after we had quenched our thirst and gotten an easy breath or two we struggled to our feet and on.

After another hour of scrambling and failing and hanging on by our finger nails, the way began to be easier. We came to level, clear stretches with only an occasional boulder or ravine, and the rock became less cruel to our bleeding feet. The relief came almost too late, for by that time every movement was painful, and we made but slow progress.

Soon we faced another difficulty when we came to a point where a split in the passage showed a lane on either side. One led straight ahead; the other branched off to the right. They were very similar, but somehow the one on the right looked more promising to us, and we took it.

We had followed this but a short distance when it broadened out to such an extent that the walls on either side could be seen but dimly. It still sloped upward, but at a very slight angle, and we had little difficulty in making our way. Another half-hour and it narrowed down again to a mere lane.

We were proceeding at a fairly rapid gait, keeping our eyes strained ahead, when there appeared an opening in the right wall at a distance of a hundred feet or so. Not ha…